Accelerating Color Space Conversion Using Extended Subwords and the Matrix Register File

Color space conversion is an important kernel in multimedia codecs such as JPEG and MPEG. When implemented using SIMD instructions, however, the performance improvement is often limited due to two reasons. First, corresponding color space components are stored at non-unit strides and, second, intermediate results can be larger than 8 bits. In this paper we show that extended subwords and the Matrix Register File (MRF) can be employed to mitigate these limitations. These techniques avoid rearrangement instructions and increase the number of subwords that are processed in parallel. Experimental results have been obtained by extending the SimpleScalar toolset. The results show that extended subwords and the MRF yield a speedup

• Type: Conference
• Year: 2006
• Where: ISM
• Authors: Asadollah Shahbahrami, Ben H. H. Juurlink, Stamatis Vassiliadis
• Keywords: Color Space, Color Space Conversion, ISM 2006, Techniques Avoid Rearrangement